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Air conditioner installation cost

With summers in the UK becoming increasingly hot and sunny, more and more British homeowners are installing air conditioning systems in their homes. In this air conditioner installation cost guide we look at average prices in the UK.

As well as increasingly warm summers and more frequent heat waves, some properties are naturally warmer than others and could benefit from air conditioning.

If you’re looking to maintain a stable temperature in your home all year round, you’ll want to know the cost to install air conditioning in a house so keep reading. For the purpose of this guide we’re focussing on built-in air conditioner systems, rather than the portable units you can buy and plug in.

We recognise the importance of keeping within budget, so we’ve spoken to the online estimators at My Build Estimate – a professional estimating company monitored by the Royal Institute of Chartered Surveyors (RICS). They’ve provided us with their estimated average prices for air conditioner installations in the UK.

ItemAverage cost
Split air conditioner system
Small home office£1,750
Double bedroom£2,250
Six room multi-split unit£7,500
Ducted air conditioner system
Small home office£3,000
Double bedroom£3,000

How much does air conditioner installation cost?

The cost to install air conditioning in a house will depend greatly on the house itself and the type of air conditioning system you want to install.

On average, the air conditioner installation cost for a small home office is between £1,250-£3,500. For a double bedroom you’re looking at an average air conditioner installation cost of £1,500-£4,000.

The main factors affecting the cost of your air conditioner installation are:

  • Size of your house
  • Type of air conditioner system
  • Quality of air conditioner unit
  • Features available (e.g. remote control, timer, app access, and sleep mode)

Find an air conditioning expert near you

Types of air conditioner systems

There are a few options when it comes to installing an air conditioner system in your home.

Portable air conditioning units

The cheapest and easiest type air conditioner system for your home is a portable (or ‘freestanding’) air conditioning unit. These units don’t require any installation and can be bought off the shelf and plugged in. For this guide we’re focusing on the built-in systems that require installation.

Cost to install air conditioning in a house

Ducted air conditioner

Ducted air conditioner systems are the most expensive option, but they are also the most discreet for homeowners looking to have their air conditioner blend in as much as possible.

A ducted system has a fan that is attached to the exterior of the home, though instead it using a wall-mounted unit, the outlet is ducted to the ceiling.


  • Most discreet air conditioner option
  • Can easily be installed for one room or split into numerous controllable zones
  • Quietest of the systems
  • Ideal for larger homes


  • Not all properties will have the ceiling space for this system

Split air conditioner

Wall mounted air conditioners, also commonly known as a ‘split air conditioner’ are the most popular type found in homes. They consist of a panel being fitted in a room, usually above head height, that circulates air over a refrigerant to cool the air.


  • A very efficient way to cool air
  • Doesn’t take up any floor space


  • A large fan unit has to be fitted to the exterior of the property
  • Not as discreet as a ducted system

Domestic air conditioner installation costs

Domestic air conditioner installation costs

Split air conditioner installation costs

If you’re opting for a split air conditioner unit, the installation cost will start at around £1,250 for a small home office at the lower end of the range up to about £2,500 for a more premium system.

For a double bedroom the split air conditioner installation cost is about £1,500-£2,500. And for a conservatory the average installation cost is £1,500-£2,500.

If you’re looking at installing a split air conditioner system for a whole house then a six room multi-split unit will cost £5,000-£9,500.

Ducted air conditioning costs

For a small home office installation, the average ducted air conditioning cost ranges from about £2,500 to £3,500. For a double bedroom, that cost is around £2,000-£4,000.

How long does it take to install?

Depending on the size of your home and the type of air conditioner system you choose, it should take between 4-8 hours. This can vary for larger homes or installations of more complex air conditioner systems.

Other air conditioner costs

In addition to the air conditioner installation costs, there are a number of other financial factors you need to consider:

  • Running costs for using your air conditioning will impact your energy bills
  • Maintenance to keep your air conditioner unit(s) in good working order
  • Supplies such as coolant and batteries for the remote control (if relevant)

Useful air conditioning checklist

  • Decide which rooms/areas of your house require air conditioning.
  • Research the types of air conditioner unit to decide which might be best for you and your home.
  • Speak to local air conditioner experts for professional advice and accurate costs.
  • Always shop around for fair and competitive prices for air conditioner installation.
  • When hiring a professional, always choose a tradesperson with appropriate experience and qualifications.

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